657242153 has 4 divisors (see below), whose sum is σ = 657357060. Its totient is φ = 657127248.

The previous prime is 657242119. The next prime is 657242161. The reversal of 657242153 is 351242756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250493929 + 406748224 = 15827^2 + 20168^2 .

It is a cyclic number.

It is not a de Polignac number, because 657242153 - 2²² = 653047849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (657242353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48398 + ... + 60471.

It is an arithmetic number, because the mean of its divisors is an integer number (164339265).

Almost surely, 2^657242153 is an apocalyptic number.

It is an amenable number.

657242153 is a deficient number, since it is larger than the sum of its proper divisors (114907).

657242153 is a wasteful number, since it uses less digits than its factorization.

657242153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114906.

The product of its digits is 50400, while the sum is 35.

The square root of 657242153 is about 25636.7344449327. The cubic root of 657242153 is about 869.4443772498. Note that the first 3 decimals are identical.

The spelling of 657242153 in words is "six hundred fifty-seven million, two hundred forty-two thousand, one hundred fifty-three".